Remove readonly for now, to be consistent

Author: OskarStark

service_container.rst

@@ -821,9 +821,9 @@ like this::
     class MessageGenerator
     {
         public function __construct(
-            private readonly LoggerInterface $logger,
+            private LoggerInterface $logger,
             #[AutowireCallable(service: MessageHashGenerator::class, method: 'generate')]
-            private readonly \Closure $generateMessageHash
+            private \Closure $generateMessageHash
         ) {
             // ...
         }

service_container/service_closures.rst

@@ -105,7 +105,7 @@ in the service class, without further configuration::
     {
         public function __construct(
             #[AutowireServiceClosure('mailer')]
-            private readonly \Closure $mailer
+            private \Closure $mailer
         ) {
             $this->mailer = $mailer;
         }

workflow.rst

@@ -278,7 +278,7 @@ attribute::
     {
         public function __construct(
             #[Target('blog_publishing')]
-            private readonly WorkflowInterface $workflow
+            private WorkflowInterface $workflow
         ) {
         }